CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 2,080	$ 1,499	$ 906
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	408	361	329
Provision for credit losses	4	19	11
Deferred income tax provision	(57)	85	15
Stock-based compensation expense	79	97	56
Gain on disposition of joint venture	(314)	0	0
Losses (gains) on sale of property, plant and equipment	9	3	(70)
Other, net	(63)	(81)	(39)
Changes in operating assets and liabilities:
Accounts receivable	81	(455)	(63)
Accounts payable and accrued expenses	35	452	73
Income taxes payable	(20)	22	29
Termination of interest rate swap agreements	0	40	0
Other assets and liabilities, net	(9)	(37)	(4)
Net cash provided by operating activities	2,233	2,005	1,243
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(331)	(330)	(58)
Proceeds from disposition of joint venture	755	0	0
Proceeds from disposition of property, plant, and equipment	3	3	91
Capital expenditures	(403)	(418)	(400)
Increase in investments and other assets, net	(3)	(27)	(44)
Net cash provided by (used in) investing activities	21	(772)	(411)
Cash flows from financing activities:
Proceeds from borrowings	0	749	2,281
Repayments of debt	(2)	(1,554)	(1,449)
Purchases of treasury stock	(2,199)	(325)	(353)
Exercise of stock options	129	189	119
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(22)	(15)	(16)
Dividends paid	(309)	(297)	(286)
Distributions to noncontrolling interest partners	(99)	(58)	(54)
Other financing activities, net	(38)	44	(17)
Net cash (used in) provided by financing activities	(2,540)	(1,267)	225
Net change in cash and cash equivalents and restricted cash	(286)	(34)	1,057
Cash and cash equivalents and restricted cash, beginning of year	1,158	1,192	135
Cash and cash equivalents and restricted cash, end of year	$ 872	$ 1,158	$ 1,192